Why doesn't it work?! (Lesson 6)


#1



https://www.codecademy.com/courses/python-beginner-en-qzsCL/1/2?curriculum_id=4f89dab3d788890003000096

I thought that I had all of my code right but the error says, "get_average(alice) raised the following error: 'float' object is not iterable"

I thought that what I had written my code correctly, but I have no idea what to do. I have no idea what to do!

lloyd = {
    "name": "Lloyd",
    "homework": [90.0, 97.0, 75.0, 92.0],
    "quizzes": [88.0, 40.0, 94.0],
    "tests": [75.0, 90.0]
}
alice = {
    "name": "Alice",
    "homework": [100.0, 92.0, 98.0, 100.0],
    "quizzes": [82.0, 83.0, 91.0],
    "tests": [89.0, 97.0]
}
tyler = {
    "name": "Tyler",
    "homework": [0.0, 87.0, 75.0, 22.0],
    "quizzes": [0.0, 75.0, 78.0],
    "tests": [100.0, 100.0]
}

def average(numbers):
    total = float(sum(numbers))
    result = total / float(len(numbers))
    return result

def get_average(student):
    homework = average(student["homework"])
    quizzes = average(student["quizzes"])
    tests = average(student["tests"])
    return sum(homework*0.1 + quizzes*0.3 + tests*0.6)


#2

len(numbers) is a counting number, not a float. This is called fudging, and is not necessary (since total is a float); and, it is not a good practice (changing a counting number to a float). A float divided by an integer still yields a float.

This is what is raising the error. sum() takes a list, not an expression. Return just the expression since it is a sum, already.


#3

you can just return the equation: (homework * 0.1) + (quizzes * 0.3) + (tests * 0.6)
return (homework * 0.1) + (quizzes * 0.3) + (tests * 0.6)